Worth the money.

I first dabbled with some free tools. However, they were unintuitive and i spent a lot of time trying to find the right files to delete. Daisy Disk’s UI is very intuitive and after 5min of poking around (and having watched the video on the website), deleting files was a breeze.
Make sure you have Time Machine backups though!

Flieger on BGG about DaisyDisk, v4.2